OAKLAND (CBS SF) – U.S. Customs and Border Protection agents recently seized roughly 2,300 rounds of ammunition and the cars used to try to smuggle them out of the country from the Port of Oakland, an agency spokesman said Thursday.

Authorities made an enforcement exam on an outbound shipping container at the port in early December and noticed inconsistencies, CBP spokesman Frank Falcon said.

READ MORE: 3 Teens Accused Of Killing Man, Stealing His Dog & Car In San Francisco On New Year's Eve

While searching the three cars in the container, destined for Mongolia, they found high-power rifle and shotgun rounds, Falcon said. The container was taken to a secure location to be unloaded, he said.

All three cars—a 2006 Lexus RX400, 2006 Toyota Land Cruiser and 2007 Toyota Camry—were taken apart, and more ammo was found in the air filters, Falcon said.

READ MORE: San Francisco Police Preparing to Handle Niner Fan Festivities on Sunday

He said the investigation determined the attempted smuggling was not an act of organized crime. It was likely an individual acting on their own, he said.

The contents found in the investigation were formally seized on Jan. 25. The value of the seized items is more than $45,000.

No arrests were made, Falcon said.

MORE NEWS: IRS Website Will Soon Require Facial Recognition To Log Into Your Account

(Copyright 2013 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)